Patents by Inventor Shu T. Tu

Shu T. Tu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Radiation curable coating composition comprising an oligomer, and an ultra-violet absorber
    Patent number: 4301209
    Abstract: A radiation curable coating comprising:A. An oligomer of Formula I: ##STR1## wherein: R.sup.1 is hydrogen or methyl;Y is a divalent urethane residue;B. A benzylidene acid ester of Formula IV: ##STR2## wherein R.sup.4 is independently alkyl or hydroxy alkylene. Preferably the coating composition contains a vinyl monomer copolymerizable with the oligomer. The process for curing the coating is also disclosed.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: November 17, 1981
    Assignee: GAF Corporation
    Inventors: Donald H. Lorenz, Shu T. Tu, Donald P. Wyman
  • Flexible substrates containing a radiation curable coating composition
    Patent number: 4216267
    Abstract: A radiation curable coating comprising:A. an oligomer of Formula I: ##STR1## wherein: R.sup.1 is hydrogen or methyl;Y is a divalent urethane residue;B. an acrylic ultra-violet light absorber of Formula IV: ##STR2## wherein R.sup.4 is alkyl or hydroxy alkylene. Preferably the coating composition contains a vinyl monomer copolymerizable with the oligomer. The process for curing the coating is also disclosed.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: August 5, 1980
    Assignee: GAF Corporation
    Inventors: Donald H. Lorenz, Shu T. Tu, Donald P. Wyman
  • Radiation curable coating composition comprising an acryl urethane oligomer, and an ultra-violet absorber
    Patent number: 4135007
    Abstract: A radiation curable coating comprising;A. an oligomer of Formula I: ##STR1## wherein: R.sup.1 is hydrogen or methyl;Y is a divalent urethane residue;B. a benzylidene acid ester of Formula IV: ##STR2## wherein R.sup.4 is independently alkyl or hydroxy alkylene. Preferably the coating composition contains a vinyl monomer copolymerizable with the oligomer. The process for curing the coating is also disclosed.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: January 16, 1979
    Assignee: GAF Corporation
    Inventors: Donald H. Lorenz, Shu T. Tu, Donald P. Wyman
  • Cyano-oligomer compositions and processes thereof
    Patent number: 4128536
    Abstract: A novel ultra-violet absorber comprising a cyano-oligomer of Formula I of FIG. 1 of the drawings wherein (Ar).sub.1, (Ar).sub.2, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Y are organic radicals is given. A radiation curable coating composition with the novel cyano-oligomer, urethane oligomers and vinyl monomers is also given. A process for curing the coating is also disclosed.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: December 5, 1978
    Assignee: GAF Corporation
    Inventors: Lee Brodsky, Donald H. Lorenz, Suzanne B. Nelsen, Shu T. Tu